Fuse plug



W. S. MACLEWEE.

FUSE PLUG.

APPHCTION FILEDVOCT. 25| 191B.

Patented Mar. 28, A1922.

- I nu entor WL'ZZa/m/ SJVzcLewee By his orney y am UNITED sTATEs f l w'LLIAi/i s. MAcnEwnn, on TRENTON, New JERSEY, assreivoit TooARRIE HOWELL l PATENT: OFFICE.

MAOLEWEE, or TRENTON, `New JnnsnY. y y,

russ. PLUG.

To @ZZ Vle/7mm 15' may concern:

l`13e it' known .that I, lVLrLLiAM f Lnwnn, a citizen of the United States,`resid` ina` at .l`renton, in the county ol Mercer and State ofNew Jersey, have invented certain new and usefulr improvements in a Fuse Plug, of "which the Yfollowing isla specification. 1 I

My invention relates to improvements in fuse plugs and particularly relates lto imA provements in a ifuse plug for which Letters Patent No. 1,2%,851 oit' the United States were granted to me on the 23rd' of October, 1917.

The object oi the present. invention is to provide means ior securing the ends ci the strip of fuse metal at the points ot contact with the ituse plug without the use of solder; a t'urther object of my invention is to provide the post for supporting the metal strip, to which one end o1Ll the fuse member is attached, with means on thevend thereof Yfor preventing the said metal strip from slipping oil the end oiE the post and a still further object ott my invention is to provide a novel form of attaching the fuse member to the central contact button. These together' with various novel features of construction and arrangements of the parts, which will be fully hereinafter described and claimed, constitute my invention.

Referring to the drawings:

Fig. l, is a vertical section of my improved fuse plug, drawn on a scale which is double the actual size; Fig. 2, is a perspective view of the inner insulating disk having a supporting post forming part thereof; Fig. 3, is a sectional perspective view of the metal shell and metal contact plate forming part thereof; and Fig. 4l, is a plan view ot the disk of insulating material forming the end of the fuse plug.

In the drawing in which like reference' characters refer to like parts, l represents the metal shell adapted to be secured to a tact plate o, forming part of the inwardly turned flange 6, and said contact plate 5 is S.. MAC- specification efte-slemrant. "PatgnfgediMa'L 25, 1922 Appneationieiea october 25, i918. serial No. '259,645.,Y

termed therein for the insertion of one end oi theV ilatstrip ot Aruse metal el. .Thefusei membert is otisolt pliable metal and may be. y

tightlyclamped around the crossbar or endpertion 1l), of the metal plate 5, as shown f inl Fig. l, and thus forms a good electrical contactiwithout soldering the parts together. 5 rlhe particular advantage of this form of attachment orthe usemember is, rthat the necessity of clamping thecontact plate' 5, around the fuse member, is avoided.y The metal strip 5 being made of hard metal will break if bent sharply or clamped over upon itself and for this reason it has heretofore been considered necessary to solder such connections.

l-y passing the end of the fuse strip l through the narrow slot 9, vformed in the head oi" the plate 5, the parts cannotbecome disconnected. Should the fuse strip 4l become loose on the cross bar 10, the fuse strip could only move on the cross bar a distance equal to the width of said slot 9 and the fuse strip would have to be unfolded to the eX- tent of a right angle'before the end could jump out et' the slot in the plate 5 and become disconnected. i

The contact plate 5 is stamped from the portion of the blank forming the bottom of the shell l and is made as long as the amount of metal in the blank will permit, sov that when said plate 5 is bent inwardly it will have sufficient length to extend beyond the cylindrical edge of the shell 1, thus making I upon the top of the post and rests between said lugs which hold the contact plate from slipping'otl' the end ot the post. ,n

The disks 12 and 'l-fl areeach provided with 'an aperture 13:3 and 15, through which the opposite and of the fuse member ,4 is passed.

The fuse member is then bent over and the end is inserted into the central apertures 22 and 23 formed in the disks to receive the cylindrical portion of the Contact button 16. The inner surface of' the head 17 of the contact button 16 rests upon and makes a good Contact with the fuse strip 4, when the inner end of the Contact button is riveted upon the said disks. By passing the end of the fuse member through both disks it is brought into Contact with the head of the button and should the latter become loose a good Contact will still be made when pressure is brought against the head of the button` by the screwing of the shell into a socket which will Cause the disk 1-/1 to press the fuse member tightly against the under side of the head of the button.

Having thus described my invention I claim and desire to secure by Letters Patent:

l` A fuse plug comprising a metal shell adapted to be secured to a body portion, a Contact plate extending from the metal shell into the interior thereof, a central Contact button, a fuse member connecting the said Contact plate with said button, a disk carrying said central Contact button, said disk having a tongue formed thereon and extending into the interior of the metal shell and forming a post to support the said Contact plate, and means formed upon the end of said post to hold the Contact plate thereon.

2. A fuse plug' Comprising a metal shell adapted to be secured to a body portion, a Contact plate extending from the metal shell into the interior thereof, a central Contact button, a fuse member connecting the said Contact plate with said button, a disk carrying said Contact button, said disk having a post formed thereon for supportingr said Contact plate and lugs formed upon the end of said post adapted to hold the Contact plate upon the post.

In testimony whereof I ailix my signature.

IVILLIAM S, MACLEWEE. 

